Saw-set.



D. McLURE.

SAW SET.

APPLICATION FILED APR. 26, 1913.

Patented Nov. 10, 1914.

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'UNITED srarias PATENT OFFICE.

DONALD MCLURE, OF LEEBURN, ONTARIO, CANADA.

SAW-SET.

To all whom it may concern Be it known that I, DONALD MCLURE, a

citizen of Canada, residing at Leeburn, in the Province of Ontario and Dominion of Canada, have invented new and useful Improvements in Saw-Sets, of which the following is a specification.

This invention relates to saw sets, and it has for its object to produce a simple and eflieient device for setting the teeth of cross cut saws.

A further object of the invention is to produce a device whereby a plurality of teeth may be simultaneously set, alternate teeth being bent or tilted in opposite directions.

A further object of the invention is to simplify and improve the construction and operation of the plunger whereby the setting is effected, as well as the operating means for said plunger.

lVith these and other ends in View which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claimsI may be resorted to when desired.

In the d1'awing,-Figure 1 is a perspective View showing the improved tooth setting device applied to a cross cut saw. Fig. 2 is a transverse sectional view taken on the line 2 2 in Fig. 1. Fig. 3 is a vertical sectional view taken substantially at right angles t0 Fig. on the plane indicated by the line 3*-3 of Fig. 1 Fig. lis a horizontal sectional view taken on the line H in Fig. 1.

Corresponding parts in the several figures are denoted by like characters of reference.

The casing of the improved saw setting device is composed of cheeks or side members 6, having abutting portions through which connecting members, such as bolts 7, extend. The lower portions of the cheeks are spaced apart by the transverse slot 8, and the inner face of one of the cheeks is provided with a recess 9 to accommodate a Specification of Letters Patent.

Application filed April 26, 1913.

Patented N ov. 10, 1914.

Serial No. 763,904.

follower 10 which may be actuated by means of a screw 11 having a crank or handle 12. At the upper end of the slot 8 is formed a transverse aperture or sight opening 13. The cheeks or side members 6 are provided with upwardly extending lugs 14. serving to su port a shaft 15 on which is mounted a ever 16 having an eccentric head 17. Said head is adapted to bear upon and to exert downward pressure against a plunger or follower 17 guided between the cheeks or side members 6 and having a V-shaped edge 18 at the lower end thereof. The plunger has been shown as being provided with transverse pins 19 guided in slots 20 in the cheeks or side members, and springs 21 are provided whereby the plunger' is normally forced in an upward direction.

The lugs 14 are connected together at one end by a plate constituting a bracket member 22 through which a set screw 23 is threaded, the point of said set screw being the movement of the latter, whereby it forces the plunger 17 in a downward direction.

In the operation of this device, by turning the screw 11 in one direction, the follower 10 may be retracted within the recess 9, thus permitting a saw blade to be inserted between the face of the follower and the inner face of the opposed cheek plate. By turning the screw 11 in an opposite direction, the follower will be advanced toward the opposite cheek plate, and the saw blade will be firmly clamped between the latter and the follower. The casing of the device will thus be firmly secured in adjusted position upon the saw blade, care having been previouslyY exercised by sighting through the opening 13 to ascertain that the device is correctly positioned with the lower edge of the plunger' 17 in proper relation to the teeth of the saw which have not been previously operated upon. The device having been firmly secured, the lever 16 is actuated to force the follower 17 in a downward direction which will result in forcibly bending alternate teeth in opposite directions; the extent of the set being regulated by the set screw which has been previously adjusted to limit the movement of the lever 1G. The device may be easily made of proper dimensions to operate simultaneously four, six or even a greater number of teeth,

disposed in the path of the lever 16 to limit o and the operation will obviously be repeated until all the teeth of the saw have been operated upon.

By this device both sides of the saw are set at the same time, alternate teeth being bent or forced in opposite directions, the points of the teeth being sprung to the necessary extent to give a clear cut and an easy running saw. Again, with this device there is no danger of springing the point of the tooth forward and the shoulder backward, as frequently happens with other saw sets. Therefore, the teeth cannot become timber-bound and obstruct and injure the saw. The device may be easily and safely operated without calling for special skill in the manipulation thereof.

Having thus described the invention, what is claimed as new, is

l. In a device of the class described, a casing, means for clamping the casing on a saw blade, and a plunger guided in the casing and having a V-shaped edge to simultaneously bend alternate saw teeth in opposite directions.

Q. A casing, means for clamping the casing on a saw blade, a plunger guided in the casing toward and from the saw teeth and having a V-shaped edge simultaneously engaging a plurality of teeth to bend alternate teeth in opposite directions, a lever for actuating the plunger, and means for limiting the throw of the lever.

3. In a device of the class described, a casing having a sight opening, means for clamping the casing on a saw blade, and a plunger' guided in the casing, lying in the plane of the saw, and having a saw tooth engaging edge projecting within the sight opening..

4. In a device of the class described, a casing having a sight opening, means for clamping the casing ona saw blade, and a plunger guided in the casing, lying in the plane of the saw, and having a V-shaped edge projecting within the sight opening and adapted to simultaneously bend alternate saw teeth in opposite directions.

5. A casing comprising cheeks or side members having abutting portions at their upper ends and spaced portions forming a slot therebetween, said spaced portions being recessed to form a sight opening at the upper end of the slot, a screw actuated follower below the sight opening, a plunger guided between the cheeks and having a V-shaped edge projecting within the sight opening, and means for actuating the plung (i. A casing comprising cheeks having abutting portions and portions that are spacedr apart to form a saw blade receiving slot, said casing being provided with a sight opening4 atA the upper end of the slot, a screw actuated follower below the sight opening, a spring actuated plunger guided between the cheeks above the sight opening and having a V-shaped lower edge projecting within the sight opening, a lever fulcrumed between the cheeks and having an eccentric head engaging the spring actuated plunger, and a sety screw supported in the path of the lever to limit the movement thereof.

In testimony whereof I aliX my signature in presence of two witnesses.

DONALD MCLURE.

Witnesses DAN MCDONALD, E. A. WHITE.

Copies of this patent.y may be obtained for ve cents each, by'addressingy the Commissioner of Patents.

Washington, D. C. 

